Quarterly report pursuant to Section 13 or 15(d)

Goodwill and Intangible Assets (Details)

v3.8.0.1
Goodwill and Intangible Assets (Details) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Dec. 30, 2017
Dec. 31, 2016
Oct. 01, 2011
Sep. 30, 2017
Goodwill and Finite-Lived Intangible Assets [Line Items]        
Goodwill, Cost $ 19,917     $ 19,917
Goodwill, Accumulated Amortization 0     0
Goodwill, Net Value 19,917     19,917
Intangibles, Cost 20,447     20,447
Intangibles, Accumulated Amortization (4,522)     (4,296)
Intangibles, Net Value 15,925     16,151
Goodwill acquired     $ 600  
Amortization of intangible assets 200 $ 300    
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]        
Amortization expense estimate for 2018 900      
Amortization expense estimate for 2019 900      
Amortization expense estimate for 2020 700      
Amortization expense estimate for 2021 600      
Amortization expense estimate for 2022 600      
Tradename/trademarks        
Goodwill and Finite-Lived Intangible Assets [Line Items]        
Intangibles, Cost 16,090     16,090
Intangibles, Accumulated Amortization (2,329)     (2,193)
Intangibles, Net Value $ 13,761     13,897
Tradename/trademarks | Minimum        
Goodwill and Finite-Lived Intangible Assets [Line Items]        
Intangibles, economic life 20 years      
Tradename/trademarks | Maximum        
Goodwill and Finite-Lived Intangible Assets [Line Items]        
Intangibles, economic life 30 years      
Customer relationships        
Goodwill and Finite-Lived Intangible Assets [Line Items]        
Intangibles, economic life 20 years      
Technology        
Goodwill and Finite-Lived Intangible Assets [Line Items]        
Intangibles, Cost $ 1,220     1,220
Intangibles, Accumulated Amortization (978)     (947)
Intangibles, Net Value $ 242     273
Intangibles, economic life 10 years      
License agreements        
Goodwill and Finite-Lived Intangible Assets [Line Items]        
Intangibles, Cost $ 2,100     2,100
Intangibles, Accumulated Amortization (449)     (423)
Intangibles, Net Value $ 1,651     1,677
License agreements | Minimum        
Goodwill and Finite-Lived Intangible Assets [Line Items]        
Intangibles, economic life 15 years      
License agreements | Maximum        
Goodwill and Finite-Lived Intangible Assets [Line Items]        
Intangibles, economic life 30 years      
Non-compete agreements        
Goodwill and Finite-Lived Intangible Assets [Line Items]        
Intangibles, Cost $ 1,037     1,037
Intangibles, Accumulated Amortization (766)     (733)
Intangibles, Net Value $ 271     $ 304
Non-compete agreements | Minimum        
Goodwill and Finite-Lived Intangible Assets [Line Items]        
Intangibles, economic life 4 years      
Non-compete agreements | Maximum        
Goodwill and Finite-Lived Intangible Assets [Line Items]        
Intangibles, economic life 8 years 6 months